Steps to reproduce:
I created a password using a third party password manager, which contained a backslash. I logged in with Orion on macOS and saved the password to Orion keychain, what worked like expected. But when I tried to login using an iOS device afterwards, the login failed with an error message saying that the username/password combination would be wrong. The macOS version of Orion kept working. After the password was changed to a one without backslashes, the iOS version started working, too.
Backslashes in passwords should work on iOS, too.
Orion, OS version; hardware type:
Orion 1.2.4 (2), iOS 16.3.1, iPhone Xs/iPhone 13 mini